Computer already join local but don´t show in Inunte Panel

Disable the MFA of the user an put it in the policy MFA

Try this one
https://www.thewindowsclub.com/windows-10-devices-cant-sync-with-intune-after-enrollment

If not work, try these steps below

1º Run the following script in powershell as adm

# Set MDM Enrollment URL's
$key = 'SYSTEM\CurrentControlSet\Control\CloudDomainJoin\TenantInfo\*'
try{
    $keyinfo = Get-Item "HKLM:\$key"
}
catch{
    Write-Host "Tenant ID is not found!"
    exit 1001
}
$url = $keyinfo.name
$url = $url.Split("\")[-1]
$path = "HKLM:\SYSTEM\CurrentControlSet\Control\CloudDomainJoin\TenantInfo\$url"
if(!(Test-Path $path)){
    Write-Host "KEY $path not found!"
    exit 1001
}else{
    try{
        Get-ItemProperty $path -Name MdmEnrollmentUrl
    }
    catch{
        Write_Host "MDM Enrollment registry keys not found. Registering now..."
        New-ItemProperty -LiteralPath $path -Name 'MdmEnrollmentUrl' -Value 'https://enrollment.manage.microsoft.com/enrollmentserver/discovery.svc' -PropertyType String -Force -ea SilentlyContinue;
        New-ItemProperty -LiteralPath $path -Name 'MdmTermsOfUseUrl' -Value 'https://portal.manage.microsoft.com/TermsofUse.aspx' -PropertyType String -Force -ea SilentlyContinue;
        New-ItemProperty -LiteralPath $path -Name 'MdmComplianceUrl' -Value 'https://portal.manage.microsoft.com/?portalAction=Compliance' -PropertyType String -Force -ea SilentlyContinue;
    }
    finally{
    # Trigger AutoEnroll with the deviceenroller
        try{
            C:\Windows\system32\deviceenroller.exe /c /AutoEnrollMDM
            Write-Host "Device is ready for Autopilot enrollment now!"
           exit 0
        }
        catch{
            Write-Host "Something went wrong (C:\Windows\system32\deviceenroller.exe)"
           exit 1001          
        }
    }
}
exit 0

OR execute this

# Set MDM Enrollment URL's

$key = 'SYSTEM\CurrentControlSet\Control\CloudDomainJoin\TenantInfo\*'
$keyinfo = Get-Item "HKLM:\$key"
$url = $keyinfo.name
$url = $url.Split("\")[-1]
$path = "HKLM:\SYSTEM\CurrentControlSet\Control\CloudDomainJoin\TenantInfo\$url"

New-ItemProperty -LiteralPath $path -Name 'MdmEnrollmentUrl' -Value 'https://enrollment.manage.microsoft.com/enrollmentserver/discovery.svc' -PropertyType String -Force -ea SilentlyContinue;
New-ItemProperty -LiteralPath $path  -Name 'MdmTermsOfUseUrl' -Value 'https://portal.manage.microsoft.com/TermsofUse.aspx' -PropertyType String -Force -ea SilentlyContinue;
New-ItemProperty -LiteralPath $path -Name 'MdmComplianceUrl' -Value 'https://portal.manage.microsoft.com/?portalAction=Compliance' -PropertyType String -Force -ea SilentlyContinue;

# Trigger AutoEnroll
C:\Windows\system32\deviceenroller.exe /c /AutoEnrollMDM

2º Open the task scheduler as admin

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3º Browse the Microsoft > Windows > Workplace Join folders

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4º Execute the 3 tasks in this folder

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Once you've done that, you'll probably see the option to synchronize in School and Account

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